In-cabinet mug holder



FIG. 1 is a perspective view of an in-cabinet mug holder showing our new design;

FIG. 2 is a side elevational elevational view thereof;

FIG. 3 is a top plan view thereof; and,

FIG. 4 is front elevational view thereof.

The broken-line disclosure of elements in the views is for illustrative purposes only and forms no part of the claimed design. 

The ornamental design for an in-cabinet mug holder, as shown and described. 